NSW vs bureau

NSW and bureau both are nouns.

Word	Noun	Adjective	Verb	Adverb
NSW	Yes	No	No	No
bureau	Yes	No	No	No

As nouns, bureau is a hypernym of NSW; that is, bureau is a word with a broader meaning than NSW:

NSW: the agency that provides units to conduct unconventional and counter-guerilla warfare
bureau: an administrative unit of government

Other hypernyms of NSW include agency, authority, federal agency, government agency, office.

NSW (noun)	bureau (noun)
the agency that provides units to conduct unconventional and counter-guerilla warfare	furniture with drawers for keeping clothes
	an administrative unit of government